Date.prototype.toLocaleString = function () {
    // 补0   例如 2018/7/10 14:7:2  补完后为 2018/07/10 14:07:02
    function addZero(num) {
        if (num < 10)
            return "0" + num;
        return num;
    }

    // 按自定义拼接格式返回
    return this.getFullYear() + "-" + addZero(this.getMonth() + 1) + "-" + addZero(this.getDate()) + " " +
        addZero(this.getHours()) + ":" + addZero(this.getMinutes()) + ":" + addZero(this.getSeconds());
};
